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Revision as of 19:43, 1 September 2015 by O3o (talk | contribs) (Feature)
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About my simpledisplay.d

It is a little library that gives access to simple windows on MS Windows and on X11 with minimal dependencies. (There's some Mac OS Cocoa code in there, but it is unmaintained because I don't have a Mac.)


  • You can create images by writing pixels in a regular format (MemoryImage) or using some operating system APIs (class Image and class Sprite)
  • Easily create a window and draw on them or get events from them
  • Build more on top of the window


import simpledisplay;
void main() {
   // create a window easily
   auto window = new SimpleWindow(500 /* width */, 500 /* height */);
       // draw on the window. it double buffers automatically, so you want it to go out of scope to show changes
       auto painter = window.draw();
       painter.outlineColor =;
       painter.drawLine(Point(0, 0), Point(500, 500));

   // do an event loop to show it and collect input
   window.eventLoop(0, // the 0 is a timer if you want approximate frames
     delegate(KeyEvent ke) {
         // key pressed or released
     delegate(dchar character) {
        // character pressed
     delegate(MouseEvent me) {
        // mouse moved or clicked

Drawing functions: see struct ScreenPainter

MemoryImages are in color.d and my other modules like png.d and bmp.d can load files into them.

More advanced features

  • clipboard text copy/paste, and PRIMARY selection on X
  • window resize handling: pass Resizability.allowResizing to the constructor, set a handler on window.windowResized
  • some OpenGL: pass OpenGlOptions.yes to the constructor. Compile with version=with_opengl on windows and have glu32.lib ready.
  • hook native events: set delegate to window.handleNativeEvent
  • open multiple windows at once
  • window.title = "something"; to rename window
  • window.icon = some_memory_image; to change window icon
  • integration with generic arsd.eventloop on Linux
  • a bunch of Windows and Xlib functions are prototyped as well
  • the event loop on Windows also calls SleepEx to clear pending async I/O for you
  • class Sprite is a pixmap for more efficient usage on X

Might (might!) be coming:

  • joystick input
  • decorationless windows
  • notification area icons